How to connect win98 to ADSl modem over the network switch?

Have one switch and network.PC number one have win98 and network adapter and connected to the switch.PC number two have winXP and network adapter and connected to the switch same as win98.Network works on win98 and winxp they see each other.internet working on winxp but dont work on win98

Sorry I frgote to tellI was set manually IP adress and it is local adressessomething like that 192.168.1.10 which in range or ADSL modemwho have DNS router or serverDo you think that on Win98 I must set automatic IP adressing?

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